Question

solve it with suitable Identities​

Answer 1

Answer:

30yz +12xz

Step-by-step explanation:

It is known that,

(x + y + z)² = x² + y² + z² + 2xy + 2yz + 2zx

(-2x + 5y – 3z)² = (-2x)² + (5y)² + (-3z)² + = 2(-2x)(5y) + 2(5y)(-32) + 2(-3)(-2x)

= 4x²+ 25y² + 9z² - 20xy

= 30yz +12xz

Hope it helps!

Answer 2

Step-by-step explanation:

(-2x)²+(5y)²+(-3z)²+2*(-2x)*(5y)+2*(5y)*(-3z)+2(-2x)*(-3z)

=4x²+5y²+9z²-20xy-30yz+12xz